Advertisements
Advertisements
Select the correct alternatives
When a bulb lights up on passing current, the change of energy is
Concept: undefined >> undefined
Select the correct alternatives
The correct statement is
Concept: undefined >> undefined
Advertisements
State the unit of energy and define it.
Concept: undefined >> undefined
What is potential energy ? State its unit.
Concept: undefined >> undefined
State two factors on which the potential energy of a body at a certain height above the ground depends.
Concept: undefined >> undefined
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Concept: undefined >> undefined
Match the following
| (a). A light ray passes from air to glass | (1) . speeds up |
| (b). A light ray passes from glass to water | (2). reflects red light |
| (c). Virtual image | (3). primary colours |
| (d). Red rose | (4). plane mirror |
| (e). Red, green, and blue | (5). slows down |
Concept: undefined >> undefined
Fill in the blank
Heat is a form of _______.
Concept: undefined >> undefined
How do we see objects around us ?
Concept: undefined >> undefined
Match the following
| Column A | Column B |
| 1. mercury | 1. insulator |
| 2. wood | 2. water from 0°C to 4°C |
| 3. Aluminum | 3.absorbs |
| 4. contracts | 4.conductor |
| 5.black surface | 5. Thermometer |
Concept: undefined >> undefined
Write true or false for a given statement.
A sound is a form of energy.
Concept: undefined >> undefined
Write true or false for a given statement.
Sound can only be produced by vibrating bodies.
Concept: undefined >> undefined
Write true or false for a given statement.
Larger is the amplitude, feeble is the sound.
Concept: undefined >> undefined
Write true or false for a given statement.
The frequency is measured in hertz.
Concept: undefined >> undefined
Write true or false for a given statement.
Loudness depends on frequency.
Concept: undefined >> undefined
Select the correct alternative
A thermometer uses
Concept: undefined >> undefined
Write true or false for a given statement.
A current-carrying coil, when suspended freely, can rest in any direction.
Concept: undefined >> undefined
Write true or false for a given statement.
Waveforms of two different stringed instruments can be the same.
Concept: undefined >> undefined
Write true or false for a given statement.
Female voice is shriller than the male voice.
Concept: undefined >> undefined
