(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

Explain the significance of kWh meter, main switch and main fuse in house-circuiting.

Name any two electromagnetic waves which have a frequency higher than that of violet light. State one use of each.

How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?

Name two sources of ultraviolet radiation.

Name two sources of infrared radiation.

State two properties of infrared radiations which differ from visible light.

State three properties of infrared radiations similar to that of visible light.

State three properties of ultra-violet radiation similar to visible light.

Give one use of electromagnetic radiation in Microwaves.

Give one use of electromagnetic radiation in Ultraviolet radiation.

Give one use of electromagnetic radiations in Infrared radiation.

Name the radiations used for the detection of fracture in bones.

State two uses of infrared radiations.

What is the wavelength of the wave whose frequency is 10¹² Hz? Name the electromagnetic wave.

(a) Name the electrical appliance shown in the diagram below.

(b) Name the material of the wire used in this device.

(c) Name two important characteristics of this wire.

An electric bulb is rated ‘240 V, 100 W’.

1. What information can you get from the above statement?
2. What will happen if this bulb is connected across 220 V?
3. Calculate the resistance of the bulb.
4. Also find the energy consumed by the bulb in 10 minutes.

Clockwise moment produced by a force about a fulcrum is considered to be ______.

The diagram shows wheel O pivoted at point A. Three equal forces F₁, F₂ and F₃ act at point B on the wheel.

1. Which force will produce maximum moment about A?
2. Give a reason for your answer in (a).

A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is ______.

Assertion (A): Ultraviolet radiations is scattered more as compared to the microwave radiations.

Reason (R): Wavelength of ultraviolet radiation is more than the wavelength of microwave radiation.