Question 1 :
The quantity of charge flowing per unit time is called .....
Question 3 :
An electrical appliance has a resistance of 4 ohms. When it is connected to a 12 V battery, the number of coulombs passing through it per second is
Question 5 :
Which of the following is true:<br/><div><span>The direction of electric current in a conducting wire is _______</span><br/></div>
Question 7 :
$5$ amperes of current is passed through a metallic conductor. The charge flowing in one minute in coulombs will be
Question 8 :
The flow of the electric current through a metallic conductor is:<br/>
Question 9 :
The potential difference across the ends of a resistor is _________ to the current through it.<br/>
Question 10 :
<span>The rate of flow of electric charges is known as: </span>
Question 11 :
When 1 coulomb of charge flows through a conductor in 1 sec, then the current passing through the conductor is?
Question 12 :
What is the relation between resistance R and resistivity $\rho$ of a wire ?
Question 14 :
The graph between potential difference and current for a conductor is a straight line passing through the origin. Which law is illustrated by such a graph?
Question 15 :
The electric current flowing through a conductor is directly proportional to the ________ across the two ends of the conductor.<br/>
Question 17 :
Direction of current is taken opposite to the direction of flow of .....
Question 18 :
Which is the expression for resistivity of a wire of length $l$ and cross-section area A?
Question 19 :
In a metallic conductor, electric current is thought to be due to the movement of:
Question 20 :
A cell of emf $6\ V$ and resistance $0.5\ ohm$ is short circuited. The current in the cell is
Question 21 :
When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become:-
Question 22 :
When ${10}^{19}$ electrons are removed from a neutral metal plate through some process, the charge on it becomes _________
Question 23 :
The resistivity of a conductor with a current density of $2.5 Am$ <br> $^{-2}$ when an electric field $5\times 10^{-8}Vm^{-1}$ is applied to it, is<br/>
Question 24 :
If a charge of $1.6 \times 10^{-19}$ C flows per second through any cross-section of any conductor, the current will be:<br/>
Question 25 :
<span>What is the approximate resistance setting of a rheostat in which $650 \ mA$ of current flows with a $150 \ V$ source?</span>
Question 26 :
If current of one ampere flows through a conductor, the number of electrons flowing across the cross section of the conductor in $2 \ seconds$ is _____(Take the charge on an electron equal to $1.6 \times 10^{-19}C$)
Question 27 :
A student measures a constant current of 0.87 A passing through a copper wire. <span>The charge that passes through a cross section of this wire in each minute is:</span>
Question 28 :
When a constant potential difference is maintained between the ends of a conductor
Question 29 :
The resistance of one conducting wire is $10 $. How much electric current will flow by connecting it with a battery of $1.5 V$ ?
Question 30 :
The current through a conductor is 1 ampere. The no. of electrons that pass through the conductor in one second is:
Question 31 :
In an electric circuit, the direction of the current is taken from
Question 32 :
A hollow cylinder $(\rho =2.2\times 10^{-8}\Omega -m)$ of length 3m has inner and outer diameter as 2mm and 4mm respectively. The resistance of the cylinder is
Question 33 :
A rod of a certain metal is $1.0\ m$ long and $0.6\ cm$ in diameter. Its resistance is $3.0\times 10^{-3}\Omega$. Another disc made of the same metal is $2.0\ cm$ in diameter and $1.0\ mm$ thick. What is the resistance between the round faces of the disc?
Question 34 :
Which particles move in a metal to cause an electric current?
Question 35 :
A bulb rated at (100W-200V) is used on a 100 V line. The current in the bulb is