Question Bank
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In a household circuit, how are all the bulbs and fans connected?
A flow of 1 ampere corresponds to how much charge per second?
Calculate the resistance of a lamp that draws 0.5 A current from a 220 V source.
Three resistors of 2 Ohms, 4 Ohms, and 6 Ohms are connected in series. What is the equivalent resistance?
Two resistors of 10 Ohms and 10 Ohms are connected in parallel. What is their combined resistance?
If the length of a wire is doubled and its cross-sectional area is kept constant, its resistance will:
Calculate the power of an appliance that consumes 3600 J of energy in 1 minute.
A step-down transformer has 400 turns in the primary and 100 turns in the secondary. If input voltage is 220V, what is the output voltage?
What is the resistivity of a wire if its resistance is 10 Ohms, length is 2 m, and area is 0.5 m^2?
Two bulbs, 60W and 100W, are connected in series. Which one will glow brighter?
What happens to the magnetic field strength of a solenoid if the number of turns is increased?
A heater is rated 220V, 2200W. What is the current drawn by it?
If a circuit has a voltage of 12V and total resistance of 3 Ohms, find the current.
Which of these factors does NOT affect the induced EMF in a coil?
If two identical resistors are connected in series, the total resistance is R_s. If they are connected in parallel, the total resistance is R_p. What is R_s / R_p?
A wire of resistance 20 Ohms is cut into two equal halves. What is the resistance of each half?
What is the potential at a point in an electric field if 20 J of work is done in moving 5 C charge to that point?
Which of the following materials is most suitable for the core of a transformer?