BSSC Inter Level · General Science
Current, circuits, magnets and electromagnetic effects.
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Q1 · Electricity and Magnetism · EASY
A copper wire has a resistance of 10 ohms. If a potential difference of 5 volts is applied across it, what current will flow through the wire?
Q2 · Electricity and Magnetism · MEDIUM
Three resistors of 2 ohms, 3 ohms and 6 ohms are connected in parallel. What is the equivalent resistance of the combination?
Q3 · Electricity and Magnetism · EASY
A magnetic compass needle always points in the north-south direction when at rest. This is because:
Q4 · Electricity and Magnetism · MEDIUM
An electric heater of 1000 watts is used for 2 hours daily. If the cost of electricity is Rs 5 per unit (1 unit = 1 kWh), what will be the electricity bill for 30 days?
Q5 · Electricity and Magnetism · EASY
If the voltage across a resistor is doubled while keeping its resistance constant, the current flowing through it will: