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In which direction does conventional current flow around a circuit?
Ten bulbs are connected in a series circuit to a power supply line. Ten identical bulbs are connected in a parallel circuit to an identical power supply line.
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Calculate the effective resistance between the points A and B in the network shown below in Figure 8.45
The work done in moving unit positive charge across two points in an electric circuit is a measure of
The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The energy dissipated in the bulb in 10 minutes.
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
An electrical appliance is rated at 1000 KVA, 220V. If the appliance is operated for 2 hours, calculate the energy consumed by the appliance in: (i) kWh (ii) joule.
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
Give the electric current unit.
