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Important Questions on Electric Current Through Conductors

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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 128

The voltage of clouds is $4 \times 10^{6}$ volt with respect to ground. In a lightening strike lasting 100 msec, a charge of 4 C is delivered to the ground. The power of lightening strike Is

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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 129
A transformer has an efficiency of 80%, It works at 4 kilowatt and 100 V. If the secondary voltage is 240 V, then the current in the secondary coil is 
 
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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 130
The output of a step down transformer is measured to be 48 V when connected to a 12 W bulb. The value of peak current is
 
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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 131
The heat developed in a system is proportional to the current through it.
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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 132
A current I flows through a potential difference V in an electrical circuit containing a resistanceR. The product of V andI, i.e., VI may be understood as :
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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 134
All bulbs in the figure are identical. Which bulb lights more brightly?
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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 135
What will happen when a 40 W, 220 V lamp and 100 W, 220 V lamp are connected in series across a 40 V supply?
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Physics Crash Course MHT-CET>Chapter 14 - Electric Current Through Conductors>Exercise 1>Q 136

Some electric bulbs are connected in series across a 220 V supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will: