Class 10 Physics Chapter 5 Question Answer

Important Class 10 Physics Chapter 5 Question Answer  written by Honorable Mr. Qamar Jamal Suib. These computerized notes are very helpful in the preparation of Sound for students of the 10th class Physics and these are according to the paper patterns of all Punjab boards.

• Here are the detailed Class 10 Physics Chapter 5 Question Answer to help you prepare for your exams.
• Important Multiple Choice Questions ( MCQs ) with correct Answers of Chapter No. 14: Current Electricity in Physics class 10th Urdu Medium.
• Important Short Questions with Correct Answers of Chapter No. 14: Current Electricity in Physics class 10th Urdu Medium.
• The time rate of flow of electric charge through any cross section is called electric current.
• The current due to flow of positive charge which is equivalent to current due to flow of negative charge in opposite direction is known as conventional current.
• Ampere is the SI unit of current.
• e.m.f. is the total amount of energy supplied by the battery or the cell in moving a one coulomb of positive charge from the -ve to the +ve terminal of the battery.
• Ohm's law states that the current I passing through a conductor is directly proportional to the potential difference V applied across its ends provided the temperature and physical state of the conductor do not change.
• Resistance R is a measure of opposition to the flow of current through a conductor. Its SI unit is ohm. It is denoted by the symbol Ω. When a potential difference of one volt is applied across the ends of a conductor and one ampere of current passes through it, then its resistance will be one ohm.
• Materials in which electrons can freely move so as to pass electricity are called conductors while in insulators no free electrons are available for the conduction of electricity.
• The equivalent resistance R eof a series combination of ‘n’ resistances is given by R = R1 + R2 + R3 +.......+ R n
• The equivalent resistance R eof a parallel combination of ‘n’ resistances is given by 1 / Re = 1 / R1 + 1 / R2 + 1 / R3 + ....... + 1 / Rn
• Galvanometer is a sensitive instrument which detects current in a circuit. It is always connected in series with the circuit.
• Ammeter is an electrical instrument which measures larger current. It is always connected in series in a circuit.
• Voltmeter is an electrical instrument used to measure potential difference between two points in a circuit. It is always connected parallel to a circuit component.
• If you're looking for comprehensive 10th class physics chapter 5 question answer, you've come to the right place.
• The amount of heat energy generated in a resistance due to flow of electric current is equal to the product of the square of current, resistance and the time interval (W = I^2 Rt). This is called Joule's law.
• kilowatt-hour is the amount of energy obtained from a source of one kilowatt in one hour. It is equal to 3.6 mega joule.
• The current which does not change its direction of flow is known as direct current or d.c.
• The current which changes its direction of flow after regular intervals of time is known as alternating current or a.c.
• Choose the correct answer from the following choices:
• An electric current in conductors is due to the flow of: (A) positive ions  (B) negative ions    (C)  positive charges  (D) free electrons
• What is the voltage across a 6 Ω resistor when 3 A of current passes through it? (A) 2 V  (B) 9 V    (C)  18 V  (D) 36 V
• What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added? (A) increases  (B) decreases  (C)  remain the same   (D) cannot be predicted
• Why should household appliances be connected in parallel with the voltage source? (A) to increase the resistance of the circuit  (B) to decrease the resistance of the circuit  (C)  to provide each appliance the same voltage as the power source   (D) to provide each appliance the same current as the power source