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qUESTIONS

If power dissipated in the 9Ω resistor in the circuit shown is 36 Watt, the potential difference across the 2Ω resistor is [2011]

A battery of emf 10 V and internal resistance 3Ω is connected to a resistor as shown in the figure. If the current in the circuit is 0.5 A, then the resistance of the resistor will be [2013]

A ring is made of a wire having a resistance R0= 12Ω. Find the points A and B as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub circuit between these points is equal to 8/3 Ω [2012]

A set of ‘n’ equal resistors, of value ‘R’ each, are connected in series to a battery of emf ‘E’ and internal resistance ‘R’. The current drawn is I. Now, the ‘n’ resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10.1. The value of ‘n’ is [2018]

A carbon resistor (47±4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be [2018]

When a resistance of 2ohm is connected across the terminals of a cell, the current is 0.5 ampere. When the resistance is increased to 5 ohm, the current is 0.25 ampere. The internal resistance of the cell is [2011]

In the circuit shown in the figure, if the potential at point A is taken to be zero, the potential at point B is [2011]

A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be [2015]

A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) of necessary shunt will be [2012]

Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between [2004]

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