Electric Current and Its Effects [CBSE (Central Board of Secondary Education) Class-7 Science]: Questions 1 - 6 of 17
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Question 1
Appeared in Year: 2016
Question MCQ▾
A simple circuit consists of a:
Choices
Choice (4) | Response | |
---|---|---|
a. | Cell and switch | |
b. | Cell, bulb and a switch | |
c. | Conductor, cell and switch | |
d. | Battery, conductor and switch |
Question 2
Question MCQ▾
Springy metal strip in an electric bell is used to:
Choices
Choice (4) | Response | |
---|---|---|
a. | Adjust the contact between metal strip and mains | |
b. | Produce sound | |
c. | Making and breaking the contacts | |
d. | Question does not provide sufficient data or is vague |
Question 3
Question MCQ▾
Needle of a compass always points towards the:
Choices
Choice (4) | Response | |
---|---|---|
a. | South-South direction | |
b. | North-South direction | |
c. | North-North direction | |
d. | South-North direction |
Question 4
Question MCQ▾
Electromagnets are used in:
Choices
Choice (4) | Response | |
---|---|---|
a. | Used in industry and municipalities | |
b. | For separating iron from non-magnetic materials | |
c. | Modern electrical devices | |
d. | All a., b. and c. are correct |
Question 5
Question MCQ▾
Electric iron and heater works on the principle of:
Choices
Choice (4) | Response | |
---|---|---|
a. | Heating effect of the electric current | |
b. | Resistance offered by the wire | |
c. | Amount of heat produced | |
d. | Question does not provide sufficient data or is vague |
Question 6
Question MCQ▾
A coil of insulted wire wound around a piece of magnetic substance is called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Electromagnet | |
b. | Magnet | |
c. | Magnetic field | |
d. | Electric field |