Physics-
General
Easy
Question
Six identical light bulbs are connected to a battery to form the circuit shown. Which light bulb(s) glow the brightest?
- 1, 2 and 3
- 5 and 6
- 1, 2, 3 and 4
- 4 only
The correct answer is: 4 only
Related Questions to study
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Resistors R1 and R2 have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be
Resistors R1 and R2 have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be
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In the circuit shown the variable resistance is so adjusted that the ammeter reading is same in both the position 1 and 2 of the key. The reading of ammeter is 2A. If E = 10 V, then x is
In the circuit shown the variable resistance is so adjusted that the ammeter reading is same in both the position 1 and 2 of the key. The reading of ammeter is 2A. If E = 10 V, then x is
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The circuit shown in figure consisting of three identical lamps and two coils is connected to a direct current source. The ohmic resistance of the coils is negligible. After some time switch S is opened. Which of the following statement(s) is/are correct for the instant immediately after opening the switch?
The circuit shown in figure consisting of three identical lamps and two coils is connected to a direct current source. The ohmic resistance of the coils is negligible. After some time switch S is opened. Which of the following statement(s) is/are correct for the instant immediately after opening the switch?
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Select the correct statement on the basis of the given graph :
Select the correct statement on the basis of the given graph :
physics-General
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The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
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A uniform rod having length L, is made of material having density r and young's modulus Y. It is placed . What minimum thermal 
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A uniform rod having length L, is made of material having density r and young's modulus Y. It is placed . What minimum thermal between two vertical walls having separation L and coefficient of friction strain should be generated in the rod by heating it so that it does not falls down on releasing.
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A uniform steel wire hangs from the ceiling and elongates due to its own weight. The ratio of elongation of the upper quarter of the wire to the elongation of the lower quarter of the wire is
A uniform steel wire hangs from the ceiling and elongates due to its own weight. The ratio of elongation of the upper quarter of the wire to the elongation of the lower quarter of the wire is
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The conducting connector ab mass m and length L can freely slide on a horizontal long conducting parallel rails connected by capacitor C at one ends (as shown in figure). A non conducting light spring (spring const. K) connected to the connector ab and it is in a relaxed state. The whole system is placed in uniform magnetic field of strength B directed into the plane of rails (as shown in figure) Now at time t = 0, connector is suddenly given a velocity V0 in rightward direction. If resistance and self inductance of circuit is negligible then
The rod will execute (after projecting it at t = 0)
The conducting connector ab mass m and length L can freely slide on a horizontal long conducting parallel rails connected by capacitor C at one ends (as shown in figure). A non conducting light spring (spring const. K) connected to the connector ab and it is in a relaxed state. The whole system is placed in uniform magnetic field of strength B directed into the plane of rails (as shown in figure) Now at time t = 0, connector is suddenly given a velocity V0 in rightward direction. If resistance and self inductance of circuit is negligible then
The rod will execute (after projecting it at t = 0)
physics-General
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The conducting connector ab mass m and length L can freely slide on a horizontal long conducting parallel rails connected by capacitor C at one ends (as shown in figure). A non conducting light spring (spring const. K) connected to the connector ab and it is in a relaxed state. The whole system is placed in uniform magnetic field of strength B directed into the plane of rails (as shown in figure) Now at time t = 0, connector is suddenly given a velocity V0 in rightward direction. If resistance and self inductance of circuit is negligible then
The maximum compression in the spring
The conducting connector ab mass m and length L can freely slide on a horizontal long conducting parallel rails connected by capacitor C at one ends (as shown in figure). A non conducting light spring (spring const. K) connected to the connector ab and it is in a relaxed state. The whole system is placed in uniform magnetic field of strength B directed into the plane of rails (as shown in figure) Now at time t = 0, connector is suddenly given a velocity V0 in rightward direction. If resistance and self inductance of circuit is negligible then
The maximum compression in the spring
physics-General
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The conducting connector ab mass m and length L can freely slide on a horizontal long conducting parallel rails connected by capacitor C at one ends (as shown in figure). A non conducting light spring (spring const. K) connected to the connector ab and it is in a relaxed state. The whole system is placed in uniform magnetic field of strength B directed into the plane of rails (as shown in figure) Now at time t = 0, connector is suddenly given a velocity V0 in rightward direction. If resistance and self inductance of circuit is negligible then
The acceleration of connector as a function of x
The conducting connector ab mass m and length L can freely slide on a horizontal long conducting parallel rails connected by capacitor C at one ends (as shown in figure). A non conducting light spring (spring const. K) connected to the connector ab and it is in a relaxed state. The whole system is placed in uniform magnetic field of strength B directed into the plane of rails (as shown in figure) Now at time t = 0, connector is suddenly given a velocity V0 in rightward direction. If resistance and self inductance of circuit is negligible then
The acceleration of connector as a function of x
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In given figure, a wire loop has been bent so that it has three segments: segment ab (a quarter circle), bc (a square corner), and ca (straight). Here are three choices for a magnetic field through the loop:
1) 
2) 
3) 
where is in militias and t is in seconds. If the induced current in the loop due to 
and 
are i1 , i2 and i3 respectively then
In given figure, a wire loop has been bent so that it has three segments: segment ab (a quarter circle), bc (a square corner), and ca (straight). Here are three choices for a magnetic field through the loop:
1)
2)
3)
where is in militias and t is in seconds. If the induced current in the loop due to and are i1 , i2 and i3 respectively then
physics-General
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A flat coil of wire is rotated at a frequency of 10 hertz in the magnetic field produced by three pairs of magnets as shown. The axis of rotation of the coil lies in the plane of the coil and is perpendicular to the field lines. What is the frequency of the alternating voltage in the coil?
A flat coil of wire is rotated at a frequency of 10 hertz in the magnetic field produced by three pairs of magnets as shown. The axis of rotation of the coil lies in the plane of the coil and is perpendicular to the field lines. What is the frequency of the alternating voltage in the coil?
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A wire frame as shown in figure is made to rotate about a vertical axis passing through O. There exists a uniform horizontal magnetic field of induction B = 1 Tesla if 
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A wire frame as shown in figure is made to rotate about a vertical axis passing through O. There exists a uniform horizontal magnetic field of induction B = 1 Tesla if . If the frame rotates (slowly) about 'O' with angular velocity directed along Z-axis having = 4rad/s, the potential difference between Owmagnitude & B is
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There exists a uniform but time varying magnetic field B = a + bt normal to plane of paper in a cylindrical region as shown. A rectangular conducting loop is placed as shown. Induced emf in branches AB and BC are
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A uniform but time variant magnetic field, directed out of the plane of paper, is switched on at t = 0 in a . A disc of certain circular region. The magnetic field is increasing at the rate ; dB/dt =
= constant nonconducting material of mass M has a radius R and is free to rotate in the region, about an axis parallel to the magnetic field and passing through the center region of magnetic field. One face of the disc is . The angular velocity of the disc at any times charged uniformly with surface charge (+ve) of density t > 0 is given by
A uniform but time variant magnetic field, directed out of the plane of paper, is switched on at t = 0 in a . A disc of certain circular region. The magnetic field is increasing at the rate ; dB/dt = = constant nonconducting material of mass M has a radius R and is free to rotate in the region, about an axis parallel to the magnetic field and passing through the center region of magnetic field. One face of the disc is . The angular velocity of the disc at any times charged uniformly with surface charge (+ve) of density t > 0 is given by
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