10th Science Refresher Course
Answer key
Topic 3. ELECTRIC CHARGE AND ELECTRIC CURRENT
- Class: 10
- Subject: Science - EM
- Topic: 3. ELECTRIC CHARGE AND ELECTRIC CURRENT
10th science Refresher Course-3-ELECTRIC CHARGE AND ELECTRIC CURRENT-answer key
Topic 3 - ELECTRIC CHARGE AND ELECTRIC CURRENT
10th Science ELECTRIC CHARGE AND ELECTRIC CURRENT Answer
Title : 10th science Bridge course Answer Worksheet 3
10th science Refresher Course-3-ELECTRIC CHARGE AND ELECTRIC CURRENT-answer key
EVALUATION
I. CHOOSE THE BEST ANSWER
1. When an ebonite rod is rubbed with fur, the charge acquired by the fur is __________
(a) negative
(b) Positive
(c) Partly positive and partly negative
(c) None of these
2. Which of the following should a simple circuit have?
(a) Energy Source, Battery, Resistor.
(b) Energy Source, Wire, Switch
(c) Energy Source, Wire, Resistor
(d) Battery, Wire, Switch
3. Fuse is __________________
(a) a switch
(b) a wire with low resistance
(c) a wire with high resistance
(d) a protective device
4. The process of depositing a layer of one metal over the surface of another metal by passing electric current is called _____________
(a) Electrolysis
(b) Electroplating
(c) Chemical effect of current
(d) Heating effect of current
5. In which circuit sum of each components will be the voltage drawn from the source?
(a) Series Circuit
(b) Parallel Circuit
(c) Simple Circuit
(d) None of these
6. In an electrolyte the current is due to the flow of
a) electrons
b) positive ions
c) both (a) and (b)
d) neither (a) nor (b)
7. Electroplating is an example for
a) heating effect
b) chemical effect
c) flowing effect
d) magnetic effect
8. Resistance of a wire depends on
a) temperature
b) geometry
c) nature of material
d) all of the above
II. FILL IN THE BLANKS: -
1. The body which has lost electrons becomes___________________
2. A device that stores electricity from chemical cells is ____________________
3. A fuse (consists) has ___________________________, ______________________
4. ____________________________ has a thin metallic filament that melts and breaks the
connection when the circuit is overheated.
5. Three bulbs are connected end to end from the battery. This connection is called ______
_____________________________.
III. TRUE OR FALSE: -
1. In this series circuit, charges (electrons) from the battery have only one path to travel.
2. In parallel circuit, current remains the same in all components.
3. Water can conduct electricity.
4. A charged body induces an opposite charge on an uncharged body when they are brought near.
5. In Parallel connection, if one component breaks down, the whole circuit will function.
expect the break down.
IV. MATHCH THE FOLLOWING: -
1. a) Circuit - A device that stores electricity from chemical
cells
b) Chemical effect of electric current - The path through which electric current flows
c) Heating effect of electric current - Electro plating
d) Unit of electric pressure - Electric cookers
e) Battery - Volt
2. a) Electric charge - Ohm
b) Potential difference - ampere
c) Electric field - Coulumb
d) Resistance - newton per coulomb
e) Electric current - volt
V. Answer the following:
1. Rubbing a plastic comb on hair makes the comb get – 0.4C.
(a) Find which material has lost electron and which one gained it.
(b) Find how many electrons are transferred in this process.
2. Name any two appliances which work under the principle of
a. Heating effect of electric current
b. Magnetic effect of electric current
c. Chemical effect of electric current
