Physics-
General
Easy
Question
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
- Opposite to OX
- Along OX
- Opposite to OY
- Along OY
The correct answer is: Along OY
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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 :
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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 
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(i) (ii)
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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)
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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
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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
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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
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A student is asked to connected four cells of e.m.f of 1 V and internal resistance 0.5 ohm in series with an external resistance of 1 ohm. But one cell is wrongly connected by him with its terminal reversed, the current in the circuit is
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