Question Text
Question 1 :
A wire of resistance {tex} { } ^ { \prime } \mathrm { R } ^ { \prime } {/tex} is cut into {tex} ^ { \prime } n ^ { \prime } {/tex} equal parts. These parts are then connected in parallel with each other. The equivalent resistance of the combination is :
Question 2 :
In a meter bridge experiment the ratio of left gap resistance to right gap resistance is {tex} 2: 3 . {/tex} The balance point from left is :
Question 3 :
What resistance should be added in the arm RS of Wheatstone bridge to balance the bridge?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ISC%20-%20Class%2012/5f7c7b3d8073fe2c5706c524"><br>
Question 5 :
Five resistors are connected as shown in figure. The effective resistance {tex} i {/tex}.e., equivalent resistance between the points A and {tex} B {/tex} is :<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ISC%20-%20Class%2012/5f7c7b3b8073fe2c5706c51f"><br>
Question 6 :
In the given figure, when the galvanometer shows no deflection, the current flowing through the {tex} 5 \Omega {/tex}<br>resistance will be :<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ISC%20-%20Class%2012/5f7c7b3e46f7292c04edf1a5">
Question 7 :
Figure below shows five d.c. sources (cells). Their e.m.f.'s are shown in the figure.<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ISC%20-%20Class%2012/5f7c7b3c8073fe2c5706c520"><br>E.m.f. of the battery {tex} \mathrm { AB } {/tex} is :
Question 8 :
The equivalent resistance between points {tex} a {/tex} and {tex} f {/tex} of the network shown in figure is :<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ISC%20-%20Class%2012/5f7c7b3d46f7292c04edf1a2"><br>
Question 9 :
If a wire is stretched to make it {tex} 0.1 \% {/tex} longer, its resistance will :
Question 10 :
If {tex} R _ { 1 } {/tex} and {tex} R _ { 2 } {/tex} are filament resistances of a {tex} 200 \mathrm { W } {/tex} and a {tex} 100 \mathrm { W } {/tex} bulb respectively, designed to operate on the same voltage, then :