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General
Easy
Question
Two thin long parallel wires separated by a distance b are carrying a current i amp each. The magnitude of the force per unit length exerted by one wire on the other is
The correct answer is:
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A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current i is established in wire as shown in figure, the loop will
A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current i is established in wire as shown in figure, the loop will
Physics-General
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Two free parallel wires carrying currents in opposite direction
Two free parallel wires carrying currents in opposite direction
Physics-General
Physics-
A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity 
, as shown, the force on the charge is
A very long straight wire carries a current I. At the instant when a charge +Q at point P has velocity , as shown, the force on the charge is
Physics-General
Physics-
A proton moving with a velocity, 2.5×107m/s, enters a magnetic field of intensity 2.5T making an angle 30° with the magnetic field. The force on the proton is
A proton moving with a velocity, 2.5×107m/s, enters a magnetic field of intensity 2.5T making an angle 30° with the magnetic field. The force on the proton is
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A moving charge will gain energy due to the application of.
A moving charge will gain energy due to the application of.
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Assume that the nuclear binding energy per nucleon (B/A) versus mass number (A) is as shown in the figure. Use this plot to choose the correct choice(s) given below. Figure :
Assume that the nuclear binding energy per nucleon (B/A) versus mass number (A) is as shown in the figure. Use this plot to choose the correct choice(s) given below. Figure :
Physics-General
Physics-
The above is a plot of binding energy per nucleon Eb , agains the nuclear mass M; A, B, C, D, E, correspond to different nuclei. Consider four reactions :
(i) 
(ii) 
(iii) 
and (iv) 
where 
is the energy released? In which reactions is positive?
The above is a plot of binding energy per nucleon Eb , agains the nuclear mass M; A, B, C, D, E, correspond to different nuclei. Consider four reactions :
(i) (ii)
(iii) and (iv)
where is the energy released? In which reactions is positive?
Physics-General
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60 W, 100 W and 1000 W bulbs are connected in parallel to the mains. The bulb that will be brightest is (all of them have same specified voltage)
60 W, 100 W and 1000 W bulbs are connected in parallel to the mains. The bulb that will be brightest is (all of them have same specified voltage)
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The emf of a cell is 2 V and its internal resistance is 2 ohm. A resistance of 8 ohm is joined to battery in parallel. This is contacted in secondary circuit of potentiometer. If 1V standard cell balances for 100 cm of potentiometer wire, the balance point of above cell is
The emf of a cell is 2 V and its internal resistance is 2 ohm. A resistance of 8 ohm is joined to battery in parallel. This is contacted in secondary circuit of potentiometer. If 1V standard cell balances for 100 cm of potentiometer wire, the balance point of above cell is
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A potentiometer wire of 10 m length and 20Ohm resistance is connected in series with a resistance R Ohms and a battery of emf 2 V, negligible internal resistance. Potential gradient on the wire is 0.16 millivolt / centimeter then R is-ohms.
A potentiometer wire of 10 m length and 20Ohm resistance is connected in series with a resistance R Ohms and a battery of emf 2 V, negligible internal resistance. Potential gradient on the wire is 0.16 millivolt / centimeter then R is-ohms.
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Physics-
When a conducting wire is connected in the left gap and known resistance in the right gap, the balance length is 75 cm If the wire is cut into 3 equal parts and one part is connected in the left gap, the balance length
When a conducting wire is connected in the left gap and known resistance in the right gap, the balance length is 75 cm If the wire is cut into 3 equal parts and one part is connected in the left gap, the balance length
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Physics-
Two equal resistances are connected in the gaps of a metre bridge. If the resistance in the left gap is increased by 10%, the balancing point shift
Two equal resistances are connected in the gaps of a metre bridge. If the resistance in the left gap is increased by 10%, the balancing point shift
Physics-General
Physics-
In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be
In the circuit shown in the figure, the value of Resistance X, when potential difference between the points B and D is zero will be
Physics-General
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The electric current 'i' in the given circuit is
The electric current 'i' in the given circuit is
Physics-General
Physics-
The potential difference between points A and B is
The potential difference between points A and B is
Physics-General
