# Formative Assessment : Magnetic effects of current for Class 10 physics

Notes NCERT Solutions Assignments

1. Why do we connect earth wire in house give two reason?
2. A neutron moving in magnetic fields experience a force.  True or false?
3.  Two magnetic field lines intersect each other True of false?
4. What is role of fuse in domestic circuit??
5. When a current carrying conductor is placed parallel to the magnetic field. Maximum force acts on the conductor true or false?
6. What is the difference between bar magnet and electromagnet?
7. State Fleming’s right hand rule?
8. Write two properties of Magnetic lines of forces?

Match the column

 Column A Column B Electric Motor It works on the magnetic effect of current Electric generator It works on the principle that a current carrying conductor is acted upon by the force in magnetic field Electromagnet Converts electric energy into mechanical energy Solenoid Converts mechanical  energy into electric  energy It works on the principle of electromagnetic induction A long coil containing a large number of close turns of insulated copper wire

Table type question

A current carrying conductor is placed in Magnetic Field.

Current is I

Length is L

Magnetic Field in B

Force on the conductor is given by below formula

F=ILBsinθ

 Angle between current carrying conductor and Magnetic Field 0 90 30 60 Force on the conductor ? ? ? ?

Some more questions to be answered based on above data

1. At what angle, the force is maximum
2. At what angle, the force is minimum

Fill in the blanks

1. 1 Tesla is equivalent to 1 Newton / Ampere X ………
2. The force on moving charge of velocity v and change Q in a magnetic Field   B is given by ………….
3. The magnitude of magnetic field produced by a straight current carrying wire at a given points is directly proportional to the   …….. , and inversely proportional to the    ……….
4. ……    is used as core in electromagnets
5. Extremely Large current can flow   in domestic wiring under two conditions ………………… and ………………………..
6.  MCB stands for   ……… …………………. ………..

Crossword Puzzle

Across

3. All the electric appliances are connected in this combination in the electric circuit
4. The material use to make fuse wire
5. This material should not be used to make fuse
6. The color of Live wire
Down
1. The color of earth wire
2. The color of neutral wire
3. The place in India where angle of declination is zero
4. The Unit of magnetic field

Solution

Fill in the blanks Solutions

1) Meter

2) BvQ

3) Current in the wire, distance of the point from wire

4) Soft iron

6) Miniature Circuit Breakers

Crossword Solutions

Across

Parallel

Tin

Copper

Red

Down

Green

Black

Pondicherry

Tesla