a. Both A and Rare true and R is the correct explanation of A.
b. Both A and Rare true but R is NOT the correct explanation of A
c. A is true but Ris false.
d. A is false and R is also false
11. ASSERTION (A): A primary cell has e. m. f. 2V. When short circuited, it gives a current of 4A. The internal resistance of the cell is 0.5 ohm
REASON (R): During short circuit load resistance becomes zero.
12. ASSERTION (A): The given figure shows a balanced Wheat stone bridge
REASON (R): For a balanced bridge no current should flow through the galvanometer.
13. ASSERTION (A): The displacement of the interfering light waves are yı= 4 sin wt and y2= 3 sin (wt + π/2) then amplitude of resultant wave is 5 unit.
REASON (R): Resultant amplitude ar = √a1^2 + a2^2 Where a1 and a2 are amplitudes of the interfering waves.
refer the attachment
Answers
Answer:
c) a is true but r is false
Answer:
The amplitude of the resultant wave is given by the formula ar = sqrt(A1^2 + A2^2 + 2A1A2cos(phi)), which in this case evaluates to ar = sqrt(4^2 + 3^2) = 5. The phase difference between the waves is pi/2, but this is not the reason why the amplitude of the resultant wave is 5.
Explanation:
Assertion (A) is true, and Reason (R) is the correct explanation of A. When a primary cell with an e.m.f. of 2V is short-circuited, it gives a current of 4A. According to Ohm's law, I = V/R, where I is the current, V is the voltage, and R is the resistance. If we assume that the short-circuiting resistance is zero, we can calculate the internal resistance of the cell using the formula R = V/I, which gives R = 0.5 ohm.
Both Assertion (A) and Reason (R) are true, but R is NOT the correct explanation of A. The figure shows a balanced Wheatstone bridge, which means that the ratio of the resistance of the arms on one side of the bridge to the resistance of the arms on the other side is equal. In a balanced bridge, the current through the galvanometer is zero, but this is not the reason why the bridge is balanced. The balance of the bridge depends on the ratio of the resistances of the arms.
Assertion (A) is true, but Reason (R) is false. The displacement of two interfering waves can be expressed as y1 = A1 sin(wt) and y2 = A2 sin(wt + phi), where A1 and A2 are the amplitudes of the waves, w is the angular frequency, t is time, and phi is the phase difference between the waves. The amplitude of the resultant wave is given by the formula ar = sqrt(A1^2 + A2^2 + 2A1A2cos(phi)), which in this case evaluates to ar = sqrt(4^2 + 3^2) = 5. The phase difference between the waves is pi/2, but this is not the reason why the amplitude of the resultant wave is 5.
To learn more about similar question visit:
https://brainly.in/question/25440041?referrer=searchResults
https://brainly.in/question/35838162?referrer=searchResults
#SPJ3