Question 3 :
A ray of light passing through the focus of a concave mirror will be :
Question 4 :
A perpendicular drawn at the point of incidence of a light ray on the surface of a mirror is called -
Question 5 :
What is the angle of incidence when a ray of light incident on a concave mirror from its centre of curvature?
Question 6 :
A ray of light is incident on a concave mirror. If it is parallel to the principal axis, the reflected ray will:
Question 8 : <div>Fill in the blanks:</div>An image that cannot be obtained on a screen is called _________.
Question 9 :
The phenomenon of light coming back after hitting a smooth plane surface is called :
Question 10 :
W<SPAN class=wysiwyg-font-size-medium><SPAN>hat is the phenomenon of light coming back after hitting a smooth plane surface called?</SPAN></SPAN>
Question 11 :
The phenomenon due to which white light splits into seven colours on passing through a prism is called _________
Question 16 :
<span>Name the colour of white light which is deviated t</span>he least, on passing through a prism.
Question 17 :
On passing white light through a glass prism. Which colour ray will deviate maximum towards its base?
Question 18 :
Inability of the eye to focus on both far and near objects with advancing age is:<br/>
Question 20 :
<span>The band of colours obtained on a screen on passing white light through a prism is called :</span>
Question 21 :
On increasing the resistance in a circuit, the current in it :
Question 22 :
A potential difference of 110 V exists across the terminals of an electric motor whose  effective resistance is equal to 5.5 ohm. The current drawn by it is:<br/>
Question 23 :
Which of the following is an advantage of using electrical symbol?
Question 25 :
A current of 300 mA is made to flow through a 6k$\Omega$ resistor. What is the potential difference across the resistor?<br/>
Question 26 :
<strong>When the current flowing through the fuse wire exceeds the safety limit, then it will <span>be ______ breaking the circuit.</span></strong><br>
Question 27 :
The potential difference between the terminals of an electric heater is 220 V and the current is 5A. What is the resistance of the heater?
Question 29 :
The potential difference across a $6\Omega$ resistor is $12V$. The current flowing in the resistor will be<br/>
Question 30 :
Which pair is not correct for the instruments used in the laboratory and their uses from the following?
Question 31 : <div>Fill in the blank space by choosing the correct word. <br/></div>Coal and petroleum are commonly called .................... fuels.<br/>
Question 32 :
The gas obtained from biomass for generating heat energy is :<br>
Question 35 :
Rise of ocean level is called ________ and fall of ocean level is called ________.
Question 38 :
Which of the following is not a property of a good source of energy?
Question 43 :
T<span>he direction of the force on a current-carrying wire placed in a magnetic field depends on</span>
Question 45 :
A coil of area $A$, turns $N$ and carrying current $i$ is placed with its face parallel to the lines of magnetic induction $B$. The work done in rotating the coil through an angle of $180^{0}$ is<br/>
Question 46 :
On what factors does the force experienced by a current <span>carrying conductor placed in a uniform magnetic field depend?</span>
Question 47 :
If a straight wire carrying a current $i_{1}$ amp runs along the axis of a circular current carrying loop having current $i_{2}$ amp, then the force of interaction between the two current carrying conductors is
Question 48 :
A small coil of N turns has an area A and a current i flows through it. The magnetic dipole moment of the coil will be<br>
Question 50 :
I<span>n a current carrying conductor, if the direction of magnetic field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be</span>
