Magnetic Field

Q. Unit of magnetic flux density (or magnetic induction) is

1. Tesla
2. $Weber/metr{e}^2$
3. Newton/ampere-metre
4. All of the above

Q. The flux of magnetic field through a closed surface is

1. sometimes zero
2. always zero
3. never zero
4. always negative

Q. A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be

[CPMT 1988; KCET 1998; UPSEAT 2001]

1. 

2. 

3. 

4. 

Q. Magnetic flux $\left(\varphi \right)$ linked through the coil changes with respect to time $\left(t\right)$ according to following graph, then induced emf $\left(e\right)$ v/s time$\left(t\right)$ graph for coil is:

1. 
2. 
3. 
4. 

Q. $Weber/m^2$ is equal to

1. Volt
2. Henry
3. Tesla
4. All of these

Q. Magnetic flux $\left(\varphi \right)$ linked through the coil changes with respect to time $\left(t\right)$ according to following graph, then induced emf $\left(e\right)$ v/s time$\left(t\right)$ graph for coil is:

1. 
2. 
3. 
4.