CTET Paper II (Upper Primary: Class 6-8)

Electricity and Magnetism - Electric Circuit Current Resistance Magnets question bank (Mathematics & Science)

Practice 38 free CTET Paper II (Upper Primary: Class 6-8) Mathematics & Science - Electricity and Magnetism - Electric Circuit Current Resistance Magnets questions with answers and step-by-step solutions.

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Q1.

An electric iron of resistance 50 ohms is connected to a 220V source for 10 minutes. If a student wants to reduce the current flowing through the circuit by half without changing the voltage source, what change should be made to the resistance?

Topic: Electricity and Magnetism - Electric Circuit Current Resistance Magnets | Source: AI Generated (CTET Paper II (Upper Primary: Class 6-8))

(A)

Decrease the resistance to 25 ohms

(B)

Increase the resistance to 100 ohms

(C)

Decrease the resistance to 12.5 ohms

(D)

Keep the resistance unchanged

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Q2.

A teacher sets up a simple series circuit with a bulb, a battery, and a switch in a Class 7 classroom. The bulb does not glow when the switch is closed. Which of the following diagnostic steps should the students take FIRST based on a systematic troubleshooting approach?

Topic: Electricity and Magnetism - Electric Circuit Current Resistance Magnets | Source: AI Generated (CTET Paper II (Upper Primary: Class 6-8))

(A)

Throw away the battery and buy a new one

(B)

Check if all terminal connections are tight and the bulb filament is intact

(C)

Add a second battery in parallel to increase power

(D)

Replace the copper wires with aluminum wires

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