WorksheetsChapter 16: Electric current and circuit
Total questions: 15
Worksheet time: 13mins
Full form of MCB is _____
miniature circuit breaker
most circuit breaker
maximum circuit breaker
minimum circuit breaker
The strength of an electromagnet can be increased by _____
increasing the number of turns of conducting wires
decreasing the number of turns
decreasing the strength of current
all of the options
What is the shape of the magnet used in an electric bell?
cylindrical
bar
horseshoe
square
Which component of a circuit converts chemical energy into electrical energy?
electric cell
electric bell
connecting wire
electric switch
Which of the following appliances does not use the heating effect of current?
electric heater
electric bell
electric geyser
electric bulb
The (a) works on the principle of heating effect of current.
(a) is used to make filament of a bulb.
Heating effect of the current was first discovered by (a)
(a) is a coil of wire closely wound in the form of spiral.
Electric bell is based on the principle of (a)
true or false. An electromagnet does not attract a piece of iron. (a)
true or false. An electric bell has an electromagnet. (a)
true or false. Magnetic effect increases with the decrease in number of turns of conducting wire
(a)
true or false. An electromagnet has two poles- North and South
(a)
true or false. The element of an electric iron is copper.
(a)
