Goyal Brothers Prakashan Class 9 Physics Workbook Solutions. We covered all the Goyal Brothers Prakashan Class 9 Physics Workbook Solutions in this post for free so that you can practice well for the exam.
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Goyal Brothers Prakashan Class 9 Physics Workbook MCQs for Students
The supply voltage to a room is 120 V. The resistance of the lead wires is 69. A 60 W bulb is already switched on. What is the decrease in voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?
(A) zero volt
(B) 2.9 volt
(C) 13.3 volt
(D) 10.40 volt
Option d – 10.40 volt
The current in the conductor varies with time t as I = 2t + 3t². Electric charge flows through a section of the conductor from t = 2 sec to t = 3 sec is
(A) 10 C
(B) 24 C
(C) 33 C
(D) 44 C
Option b – 24 C
Few resistance each of value R is connected as shown in the following diagram. The effective resistance between points A and B is
(A) 2R Ω
(B) 4R/3 Ω
(C) 2 R/3 Ω
(D) R Ω
Option c – 2 R/3 Ω
The resistances in the left and right gaps of a meter bridge are 20Ω and 30 Ω respectively. When the resistance in the left gap is reduced to half its value, the balance point shifts by :
(A) 15 cm to the right
(B) 15 cm to the left
(C) 20 cm to the right
(D) 20 cm to the left
Option b – 15 cm to the left
What will be the change in the potential gradient of the wire if one wire is replaced by another wire of double diameter in the potentiometer experiment if the initial potential gradient is Vo?
(A) Vo
(B) 2 Vo
(C) Vo/2
(D) O
Option d – O
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