If the frequency of a wave is doubled, its wavelength (at constant speed) becomes?
JEST Past Papers / All — Multiple-choice practice
اگر کسی موج کی فریکوئنسی کو دوگنا کر دیا جائے (رفتار مستقل ہو)، تو اس کی طولِ موج کیا ہو گی؟
- A. Zero
- B. None of these
- C. Halved
- D. Unchanged
Correct answer
Halved
Explanation
Explanation Wave speed is given by v = fλ . If speed remains constant, frequency and wavelength are inversely related. So, when frequency increases, wavelength decreases. If frequency is doubled, wavelength becomes half. This is a basic wave relation in physics. Last verified on 12-04-2026
Continue with All MCQs, explore all JEST Past Papers topics, or try the All practice quiz.
More All questions
- Pakistan’s law-making body/bodies is/are _____?
- I saw a beautiful bird.
- عبارت: جيئن جيئن اسلام جو پيغام، عربستان جون حدون اورانگهي اڳتي وڌڻ لڳو ته عجمي ماڻهن لاءِ قرآن شريف جي سکيا، اصول، فائدا ۽ تعليم کي سمجهڻ اوکو ٿي پيو تڏهن اھا ضرورت محسوس ڪئي
- If two similar capacitors of 4 µF each are connected in series, the equivalent capacitance is?
- The sum of Rs. 2400 is shared among Nida, Nadia, and Amara. If Nida receives Rs. 600 and the remaining amount is shared between Nadia and Amara in the ratio 4:5 respectively, how much does Amara receive?
- لفظ عقبریٰ کی معنی کیا ہیں؟
Found an error? Report a correction with this page URL and a supporting source.