Physics-
General
Easy
Question
A conductor rod AB moves parallel to X-axis in a uniform magnetic field, pointing in the positive X-direction. The end A of the rod gets.
- positively charged
- negatively charged
- neutral
- first positively charged and then negatively charged
The correct answer is: first positively charged and then negatively charged
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In a coil of self-inductance 5 H, the rate of change of current is 2 A per sec. then e.m.f. induced in the coil is
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A magnet is made to oscillate with a particular frequency, passing through a coil as shown in fig. The time variation of Fig.
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The magnetic field in the cylindrical region shown in figure increases at a constant rate of 20.0 mT/s. Each side of the square loop abcd and defa has a length of 1.00 cm and a resistance of 4.00 
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Assertion : Thermocouple acts as a heat engine.
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Assertion : Thermocouple acts as a heat engine.
Reason : When two junctions of thermocouple are at different temperature, thermo e.m.f. is produced.
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Assertion : If three identical bulbs are connected in series as shown in figure then on closing the switches. Bulb C short circuited and hence illumination of bulbs A and B decreases.
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Reason : Voltage on A and B decreases
physics-General
