Physics-
General
Easy

Question

A conducting bar rolls down a slope made of conducting rails. The bottom ends of the rails are connected by another conducting rail as shown in the figure. There is a uniform magnetic field B pointing upward. Due to the bar's motion, there is an induced current in the bar-rail circuit. What is the direction of the magnetic force on the bar?

  1. Up along the slope    
  2. Down the slope    
  3. Towards left (horizontal)    
  4. Towards right (horizontal)    

The correct answer is: Towards right (horizontal)

Related Questions to study

General
physics-

A conducting rod AC of length 4l is rotated about a point O in a uniform magnetic field stack B with rightwards arrow on top directed into the paper. AO = l and OC = 3l. Then

A conducting rod AC of length 4l is rotated about a point O in a uniform magnetic field stack B with rightwards arrow on top directed into the paper. AO = l and OC = 3l. Then

physics-General
General
physics-

A parallel-plate capacitor is connected to a battery. V0 is the potential difference between the plates, Q0 the charge on the positive plate, E0 the magnitude of the electric field. The original vacuum between the plates is filled with a dielectric and then the battery is disconnected. If the corresponding electrical parameters for the final state of the capacitor are denoted by a subscript f, which of the following is true?

A parallel-plate capacitor is connected to a battery. V0 is the potential difference between the plates, Q0 the charge on the positive plate, E0 the magnitude of the electric field. The original vacuum between the plates is filled with a dielectric and then the battery is disconnected. If the corresponding electrical parameters for the final state of the capacitor are denoted by a subscript f, which of the following is true?

physics-General
General
physics-

A capacitor of capacitance 0.1 muF is connected to a battery of emf 8V as shown in the fig. Under steady state condition

A capacitor of capacitance 0.1 muF is connected to a battery of emf 8V as shown in the fig. Under steady state condition

physics-General
parallel
General
physics-

In the circuit shown in the figure, switches S1 and S2 have been closed for a long time

In the circuit shown in the figure, switches S1 and S2 have been closed for a long time

physics-General
General
physics-

In the circuit shown, the switch is shifted from position 1 rightwards arrow 2 at t = 0. The switch was initially in position 1 since a long time. The graph between charge on capacitor C and time 't' is

In the circuit shown, the switch is shifted from position 1 rightwards arrow 2 at t = 0. The switch was initially in position 1 since a long time. The graph between charge on capacitor C and time 't' is

physics-General
General
physics-

In the circuit shown, the charge on the 3muF capacitor at steady state will be

In the circuit shown, the charge on the 3muF capacitor at steady state will be

physics-General
parallel
General
physics-

The figure below shows four parallel plate capacitors : A, B, C and D. Each capacitor carries the same charge q and has the same plate area A. As suggested by the figure, the plates of capacitors A and C are separated by a distance d while those of B and D are separated by a distance 2d. Capacitors A and B are maintained in vacuum while capacitors C and D contain dielectrics with constant k = 5.

The figure below shows four parallel plate capacitors : A, B, C and D. Each capacitor carries the same charge q and has the same plate area A. As suggested by the figure, the plates of capacitors A and C are separated by a distance d while those of B and D are separated by a distance 2d. Capacitors A and B are maintained in vacuum while capacitors C and D contain dielectrics with constant k = 5.

physics-General
General
physics-

The figure below shows four parallel plate capacitors : A, B, C and D. Each capacitor carries the same charge q and has the same plate area A. As suggested by the figure, the plates of capacitors A and C are separated by a distance d while those of B and D are separated by a distance 2d. Capacitors A and B are maintained in vacuum while capacitors C and D contain dielectrics with constant k = 5.

Which list below places the capacitors in order of increasing capacitance?

The figure below shows four parallel plate capacitors : A, B, C and D. Each capacitor carries the same charge q and has the same plate area A. As suggested by the figure, the plates of capacitors A and C are separated by a distance d while those of B and D are separated by a distance 2d. Capacitors A and B are maintained in vacuum while capacitors C and D contain dielectrics with constant k = 5.

Which list below places the capacitors in order of increasing capacitance?

physics-General
General
physics-

Two identical capacitors 1 and 2 are connected in series. The capacitor 2 contains a dielectric slab of constant K as shown. They are connected to a battery of emf V0 volts. The dielectric slab is then removed. Let Q1 and Q2 be the charge stored in the capacitors before removing the slab and Q1 and Q2  be the values after removing the slab. Then

Two identical capacitors 1 and 2 are connected in series. The capacitor 2 contains a dielectric slab of constant K as shown. They are connected to a battery of emf V0 volts. The dielectric slab is then removed. Let Q1 and Q2 be the charge stored in the capacitors before removing the slab and Q1 and Q2  be the values after removing the slab. Then

physics-General
parallel
General
physics-

Which of the following is the most suitable arrangement for measuring the unknown resistance X which has resistance in the range 0 to 10capital omega. Resistance of ammeter 1capital omega, resistance of voltmeter 10kcapital omega

Which of the following is the most suitable arrangement for measuring the unknown resistance X which has resistance in the range 0 to 10capital omega. Resistance of ammeter 1capital omega, resistance of voltmeter 10kcapital omega

physics-General
General
physics-

Three long conducting plate A, B & C having charges +q, –2q & +q as shown in figure. Here plate A and C are fixed. If the switch S is closed. The middle plate (B) will start moving in

Three long conducting plate A, B & C having charges +q, –2q & +q as shown in figure. Here plate A and C are fixed. If the switch S is closed. The middle plate (B) will start moving in

physics-General
General
physics-

Five identical parallel conducting plates each of area A have separation ‘d’ between successive surfaces. The plates are connected to the terminal of a battery as shown in the fig. The effective capacitance of the circuit is

Five identical parallel conducting plates each of area A have separation ‘d’ between successive surfaces. The plates are connected to the terminal of a battery as shown in the fig. The effective capacitance of the circuit is

physics-General
parallel
General
physics-

Some light bulbs are conected in parallel to a 120 V source as shown in the figure. Each bulb dissipates an average power of 60 W.The circuit has a fuse F that burns out when the current in the circuit exceeds 9 A. Determine the largest number of bulbs of the following, that can be used in the circuit without burning out the fuse

Some light bulbs are conected in parallel to a 120 V source as shown in the figure. Each bulb dissipates an average power of 60 W.The circuit has a fuse F that burns out when the current in the circuit exceeds 9 A. Determine the largest number of bulbs of the following, that can be used in the circuit without burning out the fuse

physics-General
General
physics-

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

physics-General
General
physics-

The circuit shown has an ideal ammeter with zero resistance and four identical light bulbs which are initially illuminated. A person removes the bulb R4 from its socket there by permanently breaking the electrical circuit at that point. Which statement(s) is/are true about the circuit after removing the bulb?

The circuit shown has an ideal ammeter with zero resistance and four identical light bulbs which are initially illuminated. A person removes the bulb R4 from its socket there by permanently breaking the electrical circuit at that point. Which statement(s) is/are true about the circuit after removing the bulb?

physics-General
parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.