Science Practice Quiz 212

Q1.Which of the following devices contains an electromagnet, as mentioned in the provided text?

A. A room heater B. A fuse C. An electric bell D. An electric cell

Q2.Why is it generally not advisable to replace a fuse with an ordinary piece of wire in an electric circuit?

A. To prevent the circuit from becoming too long. B. Ordinary wire may not melt and break the circuit during an overload, posing a safety risk. C. Fuses are more aesthetically pleasing than bare wires. D. Ordinary wire conducts electricity too slowly.

Q3.Zubeda constructed an electric circuit with a cell holder, switch, and bulb. If the bulb does not glow when the switch is in the 'ON' position, which of the following is a possible defect?

A. The cell holder is too decorative. B. The connections in the circuit might be loose. C. The switch is made of plastic. D. The bulb is too bright for the circuit.

Q4.In an electric circuit, what happens to the bulbs when the switch is in the 'OFF' position?

A. All bulbs glow brighter. B. Only some bulbs glow dimly. C. No bulbs will glow as the circuit is open. D. The bulbs consume more power.

Q5.What observation is made when a compass needle is placed near a circuit and the key is moved to the 'ON' position?

A. The compass needle remains stationary. B. The compass needle gets deflected. C. The compass needle starts vibrating rapidly. D. The compass needle points towards the circuit.

Q6.If the connections at the terminal of a cell in a circuit are reversed, what happens to the deflection of a nearby compass needle when the current is switched 'ON' again?

A. The needle deflects in the same direction. B. The needle deflects in the opposite direction. C. The needle stops deflecting entirely. D. The needle starts rotating continuously.

Q7.Based on the provided text, what is the main topic of the chapter being discussed?

A. The history of electricity. B. Electric current and its effects. C. Advanced circuit design. D. Supernatural phenomena.

Q8.Which of the following inventions is usually credited to Thomas Alva Edison, according to the provided text?

A. Electric bulb B. Telephone C. Railway signal D. Electromagnet

Q9.Which invention by Thomas Alva Edison facilitated the invention of the telephone?

A. Electric bulb B. Gramophone C. Motion picture camera D. Carbon transmitter

Q10.What was the primary purpose of the astronomical observatories known as Jantar Mantar, constructed by Sawai Jai Singh?

A. To serve as royal residences B. To store military armaments C. To study heavenly bodies D. To conduct trade and commerce

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Science Practice Quiz 212